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19-3383; rev 2; 12/12 max9995 dual, sige, high-linearity, 1700mhz to 2700mhz downconversion mixer with lo buffer/switch evaluation kit available for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maximintegrated.com. general description the max9995 dual, high-linearity, downconversion mixer provides 6.1db gain, +25.6dbm iip3, and 9.8db nf for wcdma, td-scdma, lte, td-lte, and gsm/edge base-station applications. this device integrates baluns in the rf and lo ports, a dual-input lo selectable switch, an lo buffer, two double- balanced mixers, and a pair of differential if output ampli- fiers. the max9995 requires a typical lo drive of 0dbm and supply current is guaranteed to be below 380ma. these devices are available in a compact 36-pin tqfn package (6mm 6mm) with an exposed pad. electrical performance is guaranteed over the extended tempera- ture range, from t c = -40? to +100?. applications features 1700mhz to 2700mhz rf frequency range 1400mhz to 2600mhz lo frequency range 40mhz to 350mhz if frequency range 6.1db conversion gain +25.6dbm input ip3 9.8db noise figure 66dbc 2rf - 2lo spurious rejection at p rf = -10dbm dual channels ideal for diversity receiver applications integrated lo buffer integrated rf and lo baluns for single-ended inputs low -3dbm to +3dbm lo drive built-in spdt lo switch with 50db lo1 - lo2 isolation and 50ns switching time 44db channel-to-channel isolation cdma2000 is a registered trademark of telecommunications industry association. ordering information part temp range pin-package max9995etx+ t c * = -40? to +100? 36 tqfn-ep** max9995etx+t t c * = -40? to +100? 36 tqfn-ep** +denotes a lead(pb)-free and rohs-compliant package. * t c = case temperature. ** ep = exposed pad. t = tape and reel. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 28 29 30 31 32 33 34 35 36 19 20 21 22 23 24 25 26 27 lo2 v cc gnd v cc gnd gnd tapdiv tapmain rfmain rfdiv exposed pad* ifd_set gnd ind_ext d lo_adj_d n.c. v cc v cc n.c. lo_adj_m v cc ind_ext m gnd ifm _set ifd+ ifd- v cc ifm + ifm - lo1 losel gnd gnd gnd gnd gnd v cc max9995 *exposed pad on the bottom of the package 6mm x 6mm tqfn top view pin configuration/ functional diagram wcdma, td-scdma, and cdma2000 3g base stations lte and td-lte base stations gsm/edge base stations phs/pas base stations fixed broadband wireless access wireless local loop private mobile radio military systems
max9995 dual, sige, high-linearity, 1700mhz to 2700mhz downconversion mixer with lo buffer/switch 2 maxim integrated absolute maximum ratings stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. v cc ........................................................................-0.3v to +5.5v lo1, lo2 to gnd ...............................................................?.3v ifm_, ifd_, ifm_set, ifd_set, losel, lo_adj_m, lo_adj_d to gnd.............-0.3v to (v cc + 0.3v) rfmain, rfdiv, and lo_ input power ..........................+20dbm rfmain, rfdiv current (rf is dc shorted to gnd through balun) ......................50ma continuous power dissipation (note 1) .............................6.75w operating temperature range (note 2) ...t c = -40? to +100? maximum junction temperature .....................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? soldering temperature (reflow) .......................................+260? dc electrical characteristics ( typical application circuit , no input rf or lo signals applied, v cc = 4.75v to 5.25v, t c = -40? to +85?. typical values are at v cc = 5.0v, t c = +25?, unless otherwise noted.) parameter symbol conditions min typ max units supply voltage v cc 4.75 5 5.25 v total supply current 332 380 v cc (pin 16) 82 90 v cc (pin 30) 97 110 ifm+/ifm- (total of both) 70 90 supply current i cc ifd+/ifd- (total of both) 70 90 ma losel input high voltage v ih 2v losel input low voltage v il 0.8 v losel input current i il and i ih -10 +10 ? note 1: based on junction temperature t j = t c + ( jc x v cc x i cc ). this formula can be used when the temperature of the exposed pad is known while the device is soldered down to a pcb. see the applications information section for details. the junction temperature must not exceed +150?. note 2: t c is the temperature on the exposed pad of the package. t a is the ambient temperature of the device and pcb. tqfn junction-to-ambient thermal resistance ( ja ) (note 3, 4) ....................................................................38?/w junction-to-board thermal resistance ( jb )................12.2?/w junction-to-case thermal resistance ( jc ) (note 1, 4) ...................................................................7.4?/w package thermal characteristics note 3: junction temperature t j = t a + ( j a x v cc x i cc ). this formula can be used when the ambient temperature of the pcb is known. the junction temperature must not exceed +150?. note 4: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a four-layer board. for detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial . recommended ac operating conditions parameter symbol conditions min typ max units rf frequency range f rf (note 5) 1700 2700 mhz lo frequency range f lo (note 5) 1400 2600 mhz if frequency range f if (note 5) 40 350 mhz lo drive level p lo (note 5) -3 +3 dbm
max9995 dual, sige, high-linearity, 1700mhz to 2700mhz downconversion mixer with lo buffer/switch 3 maxim integrated ac electrical characteristicsf rf = 1700mhz to 2200mhz ( typical application circuit, v cc = 4.75v to 5.25v, rf and lo ports are driven from 50 sources, p lo = -3dbm to +3dbm, f rf = 1700mhz to 2200mhz, f lo = 1400mhz to 2000mhz, f if = 200mhz, with f rf > f lo , t c = -40? to +85?. typical values are at v cc = 5.0v, p lo = 0dbm, f rf = 1900mhz, f lo = 1700mhz, f if = 200mhz, and t c = +25?, unless otherwise noted.) (notes 6, 7) parameter symbol conditions min typ max unit f rf = 1710mhz to 1875mhz 6 f rf = 1850mhz to 1910mhz 6.2 t c = +100? 4.6 conversion gain g c f rf = 2110mhz to 2170mhz 6.1 db f rf = 1710mhz to 1875mhz 0.5 1 f rf = 1850mhz to 1910mhz 0.5 1 gain variation from nominal v cc = 5.0v, t c = +25?, p lo = 0dbm, p rf = -10dbm f rf = 2110mhz to 2170mhz 0.5 1 db gain variation with temperature 0.75 db f rf = 1710mhz to 1875mhz 9.7 f rf = 1850mhz to 1910mhz 9.8 noise figure nf no blockers present f rf = 2110mhz to 2170mhz 9.9 db noise figure (with blocker) 8dbm blocker tone applied to rf port at 2000mhz, f rf = 1900mhz, f lo = 1710mhz, p lo = -3dbm 22 db input 1db compression point p 1db (note 8) 9.5 12.6 dbm (notes 8, 9) 23 25.6 input third-order intercept point iip3 t c = +100?, note 9 26.1 dbm p rf = -10dbm 66 p rf = -10dbm, t c = +100c 73.3 p rf = -5dbm 61 2rf - 2lo spur rejection 2 x 2 f rf = 1900mhz, f lo = 1700mhz, f spur = 1800mhz p rf = - 5d bm , t c = + 100c 68.3 dbc p rf = -10dbm 70 88 p rf = -10dbm, t c = +100c 84.5 p rf = -5dbm 60 78 3rf - 3lo spur rejection 3 x 3 f rf = 1900mhz, f lo = 1700mhz, f spur = 1766.7mhz p rf = - 5d bm , t c = + 100c 74.5 dbc maximum lo leakage at rf port f lo = 1400mhz to 2000mhz -29 dbm m axi m um 2lo leakag e at rf p or tf lo = 1400mhz to 2000mhz -17 dbm f lo = 1400mhz to 2000mhz -25 maximum lo leakage at if port t c = +100? -50.4 dbm f rf = 1700mhz to 2200mhz, f if = 200mhz 37 minimum rf-to-if isolation t c = +100? 44 db lo1 - lo2 isolation p lo1 = 0dbm, p lo2 = 0dbm (note 10) 40 50.5 db 40 44 minimum channel-to-channel isolation p rf = -10dbm, rfmain (rfdiv) power measured at ifdiv (ifmain), relative to ifmain (ifdiv), all unused ports terminated at 50 t c = +100? 54.7 db lo switching time 50% of losel to if settled to within 2 50 ns
max9995 dual, sige, high-linearity, 1700mhz to 2700mhz downconversion mixer with lo buffer/switch 4 maxim integrated conversion gain vs. rf frequency max9995 toc01 rf frequency (mhz) conversion gain (db) 2100 2000 1900 1800 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 3.0 1700 2200 t c = -20 c t c = +85 c t c = +25 c conversion gain vs. rf frequency max9995 toc02 rf frequency (mhz) conversion gain (db) 2100 2000 1900 1800 5.6 5.7 5.8 5.9 6.0 6.1 6.2 6.3 6.4 6.5 5.5 1700 2200 p lo = -3dbm, 0dbm, +3dbm conversion gain vs. rf frequency max9995 toc03 rf frequency (mhz) conversion gain (db) 2100 2000 1900 1800 5.6 5.7 5.8 5.9 6.0 6.1 6.2 6.3 6.4 6.5 5.5 1700 2200 v cc = 4.75v v cc = 5.0v v cc = 5.25v typical operating characteristics ( typical application circuit , v cc = 5.0v, p rf = -5dbm, p lo = 0dbm, lo is low-side injected for a 200mhz if, t c = +25?.) note 5: operation outside this frequency band is possible but has not been characterized. see the typical operating characteristics . note 6: guaranteed by design and characterization. note 7: all limits reflect losses of external components. output measurements taken at if outputs of typical application circuit . note 8: production tested. note 9: two tones 3mhz spacing, -5dbm per tone at rf port. note 10: measured at if port at if frequency. f lo1 and f lo2 are offset by 1mhz. note 11: if return loss can be optimized by external matching components. ac electrical characteristicsf rf = 2540mhz ( typical application circuit , rf and lo ports are driven from 50 sources, f rf > f lo , v cc = 5.0v, p rf = -5dbm, p lo = 0dbm, f rf = 2540mhz, f lo = 2400mhz, f if = 140mhz, t c = +25?, unless otherwise noted.) (note 7) parameter symbol conditions min typ max units rf return loss 14 db lo port selected 18 lo return loss lo port unselected 21 db if return loss lo driven at 0dbm, rf terminated into 50 (note 11) 21 db conversion gain g c 5.2 db input third-order intercept point iip3 two tones: f rf1 = 2540mhz, f rf2 = 2541mhz, p rf = -5dbm/tone 24.6 dbm p rf = -10dbm 58 2rf - 2lo spurious response 2 x 2 p rf = -5dbm 63 dbc p rf = -10dbm 72 3rf - 3lo spurious response 3 x 3 p rf = -5dbm 82 dbc lo leakage at if port -45 dbm rf-to-if isolation 49 db channel-to-channel isolation p rf = -10dbm, rfmain (rfdiv) power measured at ifdiv (ifmain), relative to ifmain (ifdiv), all unused ports terminated at 50 48 db
max9995 dual, sige, high-linearity, 1700mhz to 2700mhz downconversion mixer with lo buffer/switch 5 maxim integrated input ip3 vs. rf frequency iip3 (dbm) 24.8 25.2 25.6 26.0 26.4 26.8 24.4 max9995 toc04 rf frequency (mhz) 2100 2000 1900 1800 1700 2200 t c = +85 c t c = -20 c t c = +25 c p rf = -5dbm/tone 2rf - 2lo vs. fundamental frequency max9995 toc07 2rf - 2lo (dbc) 35 40 45 50 55 60 65 70 75 30 fundamental frequency (mhz) 2100 2000 1900 1800 1700 2200 t c = +85 c t c = +25 c t c = -20 c p rf = -5dbm 25.4 25.6 25.8 26.0 26.2 26.4 26.6 25.2 input ip3 vs. rf frequency iip3 (dbm) max9995 toc05 rf frequency (mhz) 2100 2000 1900 1800 1700 2200 p lo = 0dbm p lo = +3dbm p lo = -3dbm p rf = -5dbm/tone input ip3 vs. rf frequency iip3 (dbm) 25.0 25.4 25.8 26.2 26.6 27.0 24.6 max9995 toc06 rf frequency (mhz) 2100 2000 1900 1800 1700 2200 v cc = 5.25v v cc = 4.75v v cc = 5.0v p rf = -5dbm/tone 52 54 56 58 62 60 64 66 50 2rf - 2lo vs. fundamental frequency max9995 toc08 2rf - 2lo (dbc) fundamental frequency (mhz) 2100 2000 1900 1800 1700 2200 p lo = -3dbm p lo = +3dbm p lo = 0dbm p rf = -5dbm 52 54 56 58 62 60 64 66 50 2rf - 2lo vs. fundamental frequency max9995 toc09 2rf - 2lo (dbc) fundamental frequency (mhz) 2100 2000 1900 1800 1700 2200 v cc = 4.75v v cc = 5.0v v cc = 5.25v p rf = -5dbm typical operating characteristics (continued) ( typical application circuit , v cc = 5.0v, p rf = -5dbm, p lo = 0dbm, lo is low-side injected for a 200mhz if, t c = +25?.) 72 74 76 78 80 82 84 86 88 90 70 3rf - 3lo vs. fundamental frequency max9995 toc10 3rf - 3lo (dbc) fundamental frequency (mhz) 2100 2000 1900 1800 1700 2200 t c = -20 c t c = +25 c t c = +85 c p rf = -5dbm 74 76 78 80 84 82 86 88 72 3rf - 3lo vs. fundamental frequency max9995 toc11 3rf - 3lo (dbc) fundamental frequency (mhz) 2100 2000 1900 1800 1700 2200 p lo = -3dbm p lo = 0dbm p lo = +3dbm p rf = -5dbm 74 76 78 80 84 82 86 88 72 3rf - 3lo vs. fundamental frequency max9995 toc12 3rf - 3lo (dbc) fundamental frequency (mhz) 2100 2000 1900 1800 1700 2200 v cc = 5.0v v cc = 5.25v v cc = 4.75v p rf = -5dbm
max9995 dual, sige, high-linearity, 1700mhz to 2700mhz downconversion mixer with lo buffer/switch 6 maxim integrated channel isolation vs. rf frequency channel isolation (db) 30 40 50 60 70 80 20 max9995 toc19 rf frequency (mhz) 2100 2000 1900 1800 1700 2200 t c = +85 c t c = +25 c t c = -20 c channel isolation vs. rf frequency channel isolation (db) 40 50 60 70 80 90 30 max9995 toc20 rf frequency (mhz) 2100 2000 1900 1800 1700 2200 p lo = 0dbm p lo = +3dbm p lo = -3dbm channel isolation vs. rf frequency channel isolation (db) 40 50 60 70 80 90 30 max9995 toc21 rf frequency (mhz) 2100 2000 1900 1800 1700 2200 v cc = 4.75v v cc = 5.0v v cc = 5.25v input p 1db vs. rf frequency input p 1db (dbm) 12.8 13.2 13.6 14.0 14.4 12.4 max9995 toc13 rf frequency (mhz) 2100 2000 1900 1800 1700 2200 t c = +25 c t c = +85 c t c = -20 c lo switch isolation vs. lo frequency max9995 toc16 lo frequency (mhz) lo switch isolation (db) 1900 1800 1700 1600 1500 46 47 48 49 50 51 52 53 54 55 45 1400 2000 t c = -20 c t c = +25 c t c = +85 c 13.0 13.1 13.2 13.3 13.4 13.5 13.6 13.7 13.8 12.9 input p 1db vs. rf frequency input p 1db (dbm) max9995 toc14 rf frequency (mhz) 2100 2000 1900 1800 1700 2200 p lo = 0dbm p lo = -3dbm p lo = +3dbm 12.6 12.8 13.0 13.2 13.4 13.6 13.8 14.0 14.2 14.4 12.4 input p 1db vs. rf frequency input p 1db (dbm) max9995 toc15 rf frequency (mhz) 2100 2000 1900 1800 1700 2200 v cc = 5.25v v cc = 4.75v v cc = 5.0v 48 49 50 51 52 53 54 47 lo switch isolation vs. lo frequency max9995 toc17 lo frequency (mhz) lo switch isolation (db) 1900 1800 1700 1600 1500 1400 2000 p lo = -3dbm p lo = 0dbm p lo = +3dbm 48 49 50 51 52 53 54 47 lo switch isolation vs. lo frequency max9995 toc18 lo frequency (mhz) lo switch isolation (db) 1900 1800 1700 1600 1500 1400 2000 v cc = 4.75v, 5.0v, 5.25v typical operating characteristics (continued) ( typical application circuit , v cc = 5.0v, p rf = -5dbm, p lo = 0dbm, lo is low-side injected for a 200mhz if, t c = +25?.)
max9995 dual, sige, high-linearity, 1700mhz to 2700mhz downconversion mixer with lo buffer/switch 7 maxim integrated -55 -50 -45 -40 -30 -35 -25 -20 -60 lo leakage at if port vs. lo frequency max9995 toc22 lo leakage at if port (dbm) lo frequency (mhz) 1800 1900 1700 1600 1500 1400 2000 t c = -20 c t c = +85 c t c = +25 c -50 -45 -40 -30 -35 -25 -20 -55 lo leakage at rf port vs. lo frequency max9995 toc25 lo leakage at rf port (dbm) lo frequency (mhz) 1800 1900 1700 1600 1500 1400 2000 t c = -20 c t c = +85 c t c = +25 c -50 -45 -40 -35 -30 -25 -55 lo leakage at if port vs. lo frequency max9995 toc23 lo leakage at if port (dbm) lo frequency (mhz) 1800 1900 1700 1600 1500 1400 2000 p lo = -3dbm p lo = +3dbm p lo = 0dbm -45 -40 -35 -30 -25 -50 lo leakage at if port vs. lo frequency max9995 toc24 lo leakage at if port (dbm) lo frequency (mhz) 1800 1900 1700 1600 1500 1400 2000 v cc = 5.25v v cc = 4.75v v cc = 5.0v -45 -40 -35 -30 -25 -20 -50 lo leakage at rf port vs. lo frequency max9995 toc26 lo leakage at rf port (dbm) lo frequency (mhz) 1800 1900 1700 1600 1500 1400 2000 p lo = +3dbm p lo = -3dbm p lo = 0dbm -55 -50 -45 -40 -30 -35 -25 -20 -60 lo leakage at rf port vs. lo frequency lo leakage at rf port (dbm) lo frequency (mhz) 1800 1900 1700 1600 1500 1400 2000 v cc = 4.75v, 5.0v, 5.25v max9995 toc27 typical operating characteristics (continued) ( typical application circuit , v cc = 5.0v, p rf = -5dbm, p lo = 0dbm, lo is low-side injected for a 200mhz if, t c = +25?.) 39 40 41 42 43 44 45 38 rf-to-if isolation vs. rf frequency rf-to-if isolation (db) max9995 toc28 rf frequency (mhz) 2100 2000 1900 1800 1700 2200 t c = +85 c t c = -20 c t c = +25 c 37 39 38 40 41 43 42 45 44 46 36 rf-to-if isolation vs. rf frequency rf-to-if isolation (db) max9995 toc29 rf frequency (mhz) 2100 2000 1900 1800 1700 2200 p lo = -3dbm, 0dbm, +3dbm 40.0 40.5 41.0 41.5 42.0 42.5 43.0 39.5 rf-to-if isolation vs. rf frequency rf-to-if isolation (db) max9995 toc30 rf frequency (mhz) 2100 2000 1900 1800 1700 2200 v cc = 5.25v v cc = 4.75v v cc = 5.0v
max9995 dual, sige, high-linearity, 1700mhz to 2700mhz downconversion mixer with lo buffer/switch 8 maxim integrated lo return loss vs. lo frequency (lo input un selected) max9995 toc37 lo frequency (mhz) lo return loss (db) 1900 1800 1700 1600 1500 30 25 20 15 10 5 0 35 1400 2000 p lo = -3dbm, 0dbm, +3dbm 310 330 325 320 315 340 335 360 355 350 345 365 -20-5102540557085 supply current vs. temperature (t c ) max9995 toc38 temperature ( c) supply current (ma) v cc = 5.25v v cc = 4.75v v cc = 5.0v noise figure vs. rf frequency max9995 toc31 rf frequency (mhz) noise figure (db) 2100 2000 1800 1900 7 8 9 10 12 11 13 14 6 1700 2200 t c = +85 c t c = +25 c t c = -20 c rf return loss (db) 25 20 15 10 5 0 30 rf return loss vs. rf frequency max9995 toc34 rf frequency (mhz) 2100 2000 1800 1900 1700 2200 p lo = -3dbm, 0dbm, +3dbm 9.7 9.8 9.9 10.0 10.1 10.2 9.6 noise figure vs. rf frequency max9995 toc32 rf frequency (mhz) noise figure (db) 2100 2000 1800 1900 1700 2200 p lo = -3dbm p lo = 0dbm p lo = +3dbm 9.6 9.7 9.8 9.9 10.0 10.1 10.2 10.3 10.4 10.5 9.5 noise figure vs. rf frequency max9995 toc33 rf frequency (mhz) noise figure (db) 2100 2000 1800 1900 1700 2200 v cc = 5.25v v cc = 5.0v v cc = 4.75v if return loss vs. if frequency max9995 toc35 if frequency (mhz) if return loss (db) 320 280 200 240 120 160 80 40 35 30 25 20 15 10 5 0 45 40 360 lo return loss vs. lo frequency (lo input selected) max9995 toc36 lo frequency (mhz) lo return loss (db) 1900 1800 1700 1600 1500 20 15 10 5 0 25 1400 2000 p lo = +3dbm p lo = 0dbm p lo = -3dbm typical operating characteristics (continued) ( typical application circuit , v cc = 5.0v, p rf = -5dbm, p lo = 0dbm, lo is low-side injected for a 200mhz if, t c = +25?.)
max9995 dual, sige, high-linearity, 1700mhz to 2700mhz downconversion mixer with lo buffer/switch 9 maxim integrated pin name function 1 rfmain main channel rf input. internally matched to 50 . requires an input dc-blocking capacitor. 2 tapmain main channel balun center tap. connect a 0.033? capacitor from this pin to the board ground. 3, 5, 7, 12, 20, 22, 24, 25, 26, 34 gnd ground 4, 6, 10, 16, 21, 30, 36 v cc power supply. connect bypass capacitors as close as possible to the pin (see the typical application circuit) . 8 tapdiv diversity channel balun center tap. connect a 0.033? capacitor from this pin to the ground. 9 rfdiv diversity channel rf input. internally matched to 50 . requires an input dc-blocking capacitor. 11 ifd_set if diversity amplifier bias control. connect a 1.2k resistor from this pin to ground to set the bias current for the diversity if amplifier. 13, 14 ifd+, ifd- diversity mixer differential if output. connect pullup inductors from each of these pins to v cc (see the typical application circuit ). 15 ind_extd connect a 10nh inductor from this pin to ground to increase the rf-if and lo-if isolation. 17 lo_adj_d lo diversity amplifier bias control. connect a 392 resistor from this pin to ground to set the bias current for the diversity lo amplifier. 18, 28 n.c. no connection. not internally connected. 19 lo1 local oscillator 1 input. this input is internally matched to 50 . requires an input dc-blocking capacitor. 23 losel local oscillator select. set this pin to high to select lo1. set to low to select lo2. 27 lo2 local oscillator 2 input. this input is internally matched to 50 . requires an input dc-blocking capacitor. 29 lo_adj_m lo main amplifier bias control. connect a 392 resistor from this pin to ground to set the bias current for the main lo amplifier. 31 ind_extm connect a 10nh inductor from this pin to ground to increase the rf-if and lo-if isolation. 32, 33 ifm-, ifm+ main mixer differential if output. connect pullup inductors from each of these pins to v cc (see the typical application circuit ). 35 ifm_set if main amplifier bias control. connect a 1.2k resistor from this pin to ground to set the bias current for the main if amplifier. ?p exposed pad. internally connected to gnd. solder this exposed pad to a pcb pad that uses multiple ground vias to provide heat transfer out of the device into the pcb ground planes. these multiple via grounds are also required to achieve the noted rf performance. pin description
max9995 dual, sige, high-linearity, 1700mhz to 2700mhz downconversion mixer with lo buffer/switch 10 maxim integrated detailed description the max9995 dual, high-linearity, downconversion mixer provides 6.1db gain and +25.6dbm iip3, with a 9.8db noise figure. integrated baluns and matching cir- cuitry allow 50 single-ended interfaces to the rf and lo ports. a single-pole, double-throw (spdt) lo switch provides 50ns switching time between lo inputs, with 50db lo-to-lo isolation. furthermore, the integrated lo buffer provides a high drive level to the mixer core, reducing the lo drive required at the max9995? inputs to -3dbm. the if port incorporates a differential output, which is ideal for providing enhanced 2rf - 2lo performance. specifications are guaranteed over broad frequency ranges to allow for use in wcdma, td-scdma, lte, td-lte, and gsm/edge base stations. the max9995 is specified to operate over an rf input range of 1700mhz to 2700mhz, an lo range of 1400mhz to 2600mhz, and an if range of 40mhz to 350mhz. operation beyond this is possible; however, perfor- mance is not characterized. this device is available in a compact 6mm x 6mm, 36-pin tqfn package with an exposed pad. rf input and balun the max9995? two rf inputs (rfmain and rfdiv) are internally matched to 50 , requiring no external match- ing components. dc-blocking capacitors are required as the inputs are internally dc shorted to ground through the on-chip baluns. input return loss is typically 14db over the entire rf frequency range of 1700mhz to 2700mhz. lo input, switch, buffer, and balun the mixers can be used for either high-side or low-side injection applications with an lo frequency range of 1400mhz to 2600mhz. as an added feature, the max9995 includes an internal lo spdt switch that can be used for frequency-hopping applications. the switch selects one of the two single-ended lo ports, allowing the external oscillator to settle on a particular frequency before it is switched in. lo switching time is typically less than 50ns, which is more than adequate for virtually all gsm applications. if frequency hopping is not employed, set the switch to either of the lo inputs. the switch is controlled by a digital input (losel): logic-high selects lo1, and logic-low selects lo2. lo1 and lo2 inputs are internally matched to 50 , requiring only a 22pf dc-blocking capacitor. a two-stage internal lo buffer allows a wide input power range for the lo drive. all guaranteed specifica- tions are for an lo signal power from -3dbm to +3dbm. the on-chip low-loss balun, along with an lo buffer, drives the double-balanced mixer. all interfacing and matching components from the lo inputs to the if out- puts are integrated on-chip. high-linearity mixers the core of the max9995 is a pair of double-balanced, high-performance passive mixers. exceptional linearity is provided by the large lo swing from the on-chip lo buffer. when combined with the integrated if ampli- fiers, the cascaded iip3, 2rf - 2lo rejection, and nf performance is typically +25.6dbm, 66dbc, and 9.8db, respectively. differential if output amplifiers the max9995 mixers have an if frequency range of 40mhz to 350mhz. the differential, open-collector if output ports require external pullup inductors to v cc . note that these differential outputs are ideal for provid- ing enhanced 2rf - 2lo rejection performance. single- ended if applications require a 4:1 balun to transform the 200 differential output impedance to a 50 single- ended output. after the balun, vswr is typically 1.5:1. applications information input and output matching the rf and lo inputs are internally matched to 50 . no matching components are required. return loss at each rf port is typically 14db over the entire input range (1700mhz to 2700mhz), and return loss at the lo ports is typically 18db (1400mhz to 2000mhz). rf and lo inputs require only dc-blocking capacitors for interfacing. the if output impedance is 200 (differential). for evaluation, an external low-loss 4:1 (impedance ratio) balun transforms this impedance down to a 50 single- ended output (see the typical application circuit ). bias resistors bias currents for the lo buffer and the if amplifier are optimized by fine tuning the resistors (r1, r2, r4, and r5). if reduced current is required at the expense of per- formance, contact the factory. if the 1% bias resistor values are not readily available, substitute standard 5% values.
max9995 dual, sige, high-linearity, 1700mhz to 2700mhz downconversion mixer with lo buffer/switch 11 maxim integrated indextm and indextd inductors short indextm and indextd to ground using 0 resistors. for applications requiring improved rf-to-if and lo-to-if isolation, use 10nh inductors (l3 and l6) in place of the 0 resistors. however, to ensure stable operation, the mixer if ports must be presented with low common-mode load impedance. contact the facto- ry for details. since approximately 100ma flows through indextm and indextd, it is important to use low-dcr wire-wound inductors. layout considerations a properly designed pcb is an essential part of any rf/microwave circuit. keep rf signal lines as short as possible to reduce losses, radiation, and inductance. for the best performance, route the ground pin traces directly to the exposed pad under the package. the pcb exposed pad must be connected to the ground plane of the pcb. it is suggested that multiple vias be used to connect this pad to the lower-level ground planes. this method provides a good rf/thermal-con- duction path for the device. solder the exposed pad on the bottom of the device package to the pcb. the max9995 evaluation kit can be used as a reference for board layout. gerber files are available upon request at www.maximintegrated.com . power-supply bypassing proper voltage-supply bypassing is essential for high- frequency circuit stability. bypass each v cc pin with a capacitor as close as possible to the pin ( typical application circuit ). exposed pad rf/thermal considerations the exposed pad (ep) of the max9995? 36-pin tqfn- ep package provides a low thermal-resistance path to the die. it is important that the pcb on which the max9995 is mounted be designed to conduct heat from the ep. in addition, provide the ep with a low- inductance path to electrical ground. the ep must be soldered to a ground plane on the pcb, either directly or through an array of plated via holes. package type package code outline no. land pattern no. 36 tqfn-ep t3666+2 21-0141 90-0049 chip information process: sige bicmos lead-free/rohs considerations http://www.maximintegrated.com/emmi/faq.cfm reliability information: http://www.maximintegrated.com/reliability/product/ max9995.pdf table 1. component values component value description c1, c8 4pf microwave capacitors (0402) c2, c7 10pf microwave capacitors (0402) c3, c6 0.033? microwave capacitors (0603) c4, c5, c14, c16 22pf microwave capacitors (0402) c9, c13, c15, c17, c18 0.01? microwave capacitors (0402) c10, c11, c12, c19, c20, c21 150pf microwave capacitors (0603) l1, l2, l4, l5 330nh wire-wound high-q inductors (0805) l3, l6 10nh wire-wound high-q inductors (0603) r1, r4 1.21k ? 1% resistors (0402) r2, r5 392 ? 1% resistors (0402) r3, r6 10 ? 1% resistors (1206) t1, t2 4:1 (200:50) if baluns package information for the latest package outline information and land patterns (foot- prints), go to www.maximintegrated.com/packages . note that a ?? ?? or ??in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status.
max9995 dual, sige, high-linearity, 1700mhz to 2700mhz downconversion mixer with lo buffer/switch 12 maxim integrated rf main input rf div input c2 c3 c1 c8 c9 c13 c17 c18 r1 v cc l2 l1 r3 c20 c19 if main output t1 c16 r2 l3 lo2 c14 lo1 4:1 4:1 v cc v cc v cc v cc 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 28 29 30 31 32 33 34 35 36 19 20 21 22 23 24 25 26 27 lo2 v cc gnd v cc gnd gnd tapdiv tapmain rfmain rfdiv exposed pad ifd_set gnd ind_extd lo_adj_d n.c. v cc v cc n.c. lo_adj_m v cc ind_extm gnd ifm_set ifd+ ifd- v cc ifm+ ifm- lo1 losel gnd gnd gnd gnd gnd v cc max9995 c4 c7 c6 c5 v cc v cc c21 lo select c15 v cc r5 r4 v cc l4 l5 r6 l6 c10 c11 t2 if div output c12 typical application circuit
maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integr ated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and specifications without notice at any time . the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated 160 rio robles, san jose, ca 95134 usa 1-408-601-1000 ________________________________ 13 2012 maxim integrated products, inc. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products , inc. max9995 dual, sige, high-linearity, 1700mhz to 2700mhz downconversion mixer with lo buffer/switch revision history revision number revision date description pages changed 0 8/04 initial release 1 3/11 updated the band coverage throughout the data sheet 1?3 2 12/12 updated the electrical characteristic table and ordering information ; updated package thermal characteristics 1, 2, 3

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